Electric-lamp socket.



ITTENTED JULY '7, 10051;.

J. H. HNSON.

BLEGTRC LAMP SOCKET.

APPL'OATO flLlIll JUNE 3, '1907.

@JEM

JOHN H. HANSON, OI" CHICAGO, .ILLINOIS i ELECTRIC-LAMP SOCKET.

Specification of Letters Patent.

Patented July 7', 1908.

application filed June 3, 1907. Ben'al No. 376,950.

To all whom. it 'may concern.'

Be it known that l, JOHN H. HANsoN, a citizen of the llnited States, residing at Chicago, in the county ol Cook and State of lllinois, have invented certain new and useful Improvements in Electric-Lamp Sockets, of which the following is a specification.

My invention relates to improvements in electric. lamp sockets, and more particularly 1n tok pull sockets of the general character described inmy Patent No. 847,939, dated March 19th. 1907.

One olr the salient. objects of my invention is to provide a pull socket wherein the pull cord or chain may be metallic, and is completely insulated from contact with any part to be energized of the socket structure.

A lurther object of my invention is to provide a generally improved structure of the character described.

ln the drawing. wherein I have-illustrated a practical eiiibodiment of my invention: Figure] is asectional view through the casing, with parts ol' the socket structure in elevation. Fig. .2 is an opposite elevation of the. socket structure with the easing removed. Fig. 3 is a central section on line 3 3 of Fig. 1. F ig;"`-t is a transverse section on line 4---4r ot Fig. l, and, Figs. 5, (i, 7 and'S are details. 'lhronghout the views like numerals of re'lerence rel'er always to like parts.

ln the drawing 1() indicates an insulatin0r base preferablyr oi porcelain, providinwpre erably a disk-like head 11, from which jects a segmental rear wall 12, anda front post 13, the latter separated from and arranged generally at right angles to the rear wall l2 near the med' m line intersecting the. latter. 'llnis there are provided on the nnder lace olY head l] two troc areas,'eaeh terminating in part at the perimeter of the head l1, .and bounded inpart by the front tace of rear wall 12 and` by opposite side 'laces ot the l'ront wall 13, such areas being `comieetcd by the opening between post l-i and wall 12,

as best shown in Fig. 4.

' 'lo the disk l l is secured the metallic yoke 15, extending transverselyr ol' the disk -between the wall l2 and pest 13, `provided with an oll'set terminal 15, and having its opposite extremities downtnrned to form bearing members It, 16 provided with bearing apertures `l'or the reception oli the actuating shaft 17. Said shaft 17 carries adjacent the probearing 16 a squared contact head 18 comprising an oblong metallic member 1.9 and an insulating block 20, of porcelain or the like. The insulatin block 20 is of width preferably slightly ess than the 'length of contact member 19, and is provided wlth a recess in its face, wherein the contact member 19 is seatcd-to protrude slightly from opposite sides of the insulation. Thus the contact head `18 is substantially a square presenting two insulating faces and two connected nietallic faces. A spring 21 is provided to bear upon the contact head 18, such spring being preferably in the form of 'a leaf, passing through an aperature 22 in the yoke 15, and having its'xed end secured between said voke and the disk part 11 of the insulating ase.

To the central portion of the shaft 17 is secured a four-toothed ratchet member 23, with which coacts a relatively movable ratchet member 24 fitted in and carried by an' insulating carrier member 25, preferably made of porcelain and loosely mounted on the actuating shaft 17 for axial and rotary movement, and arranged on the opposite side of wall 13 from contact head 1N. The member 25 is provided on its under side with a cord attaching projection 2G, having made therein a groove 27, at one sid-e enlarged as at 27', the enlargement being at the rear side of the groove 27 with respect to the direc` tion of operative motion .of the projection.

28 indicates a coiled spring interposed between the carrier 25 and the bearingpart loof the yoke, at one; end secured to said yoke partand at its opposite end secured to the carrier, said spring tending always to turn the carrier rotarlly in such direction as to bring its depending projection 26 into nor- ,lnal )osition in contact with the rear wall 12 ov the insulating base, and to press the carrier and ratchet member 24 inward toward the ratchet member 23 for engagementto be relatively stili or rigid, such plate covg e'ring the entire portion of the socket 30 which lies below t e carrier 25.

-3G has connected thereto a sprinv 33, ar-

; tact with any par-tto be electrically ranged for constant contact with the lower side ofthe contact head 1S, and the center contact 34 is provided in insulated relation to the shell, and extends u through a groove 35 in the rear wall 12 of tile insulating base, to a suitable terminal 36. l

37 indicates a casing, or shell, of any suitable construction, interiorly insulated as by a sheet oi insulating material 38, extendin throughout its entire eriphery. Said shell is rovided at a suitable point withea suitab e outwardlyl flaring throat 39, arranged a proximately at right angles to the axis oi) the shaft 17 in alinement with theslot 27 in carrier 25.

40 indicates the pull cord, which is preferably of metallic material for good wearing qualities, and is illustrated as a well known form ci ball and link chain,lsaid pull cord 40 passing through the throat 39 and having an'end link- .l provided at its extremity with a ball enlargement 41 seated in the slot 27 and enlargement27.

lt' will be observed with respect to the electric conditionof the,` pull cord 40 that it is completely insulated from possible concharged, by 'the insulating carrier 25 an disk 11 above, the iront post 13, on the one side, and

the rear wall ..12 on arother side, the insu- 1rating sheet 38 throughout the remaining Walls ci the area on the same side of post 13 Then the cord 40 is as the pull cord, and the insulating late 31 below., As the shell 38 -i's thoroug y insulated trom the electricallyenergized parts the passage of the metallic pull cord through the throat 39 imparts vnoeleetrimtl charge thereto. f l Y The o eration of thedevice constructed ,in accor( ance withgmy prf-sent invention is as' follows: Normally the carrier 25 stands with its projection'26 engaging the rear wall 12 of the `insulating base, and ratchet'member 24 engaging the ratchet. member 23. ulled the carrier 24 has its projection 26 crawn forwardly and throu h the coaction of the ratchet members 24 ancgl 23 the shaft. 17 is lgiven a quarter turn, so im arting a 1 arter revolution to the contact ead 18. e provision of the square head with 'alternate faces of conducting .and

insulating material maintains approximately the same resistance to the pul many position and positively revente accidental complet'ion of circuit wlien the head is in off position.

Having thus described my invention, what The socket I claim vand desire to secure by Letters Patent, of the United States, is:

1. ln a pull socket, an integral insulating base comprising adisk, a rear wall and a front post separated from the rear wall; an actuating shaft extending between said wall and said post, a contact head on the shaft on one side of the post; va ratchet fixed on the shaft; a coacting i"atchet, and an insulation carrier therefor on the opposite side of sai post, an insulated socket below theI post and rear wall, an insulated casing surrounding the base, and rovided with an orifice, and a metallic pull cord connected withthe ratchet carrier and extending through said orifice.

2. ln a pull socket, an insulating base comprising a disk, a rear wall and a front post separated from the rear wall, an actuating shaft extending between said wall and post, a contact head mounted on the shaft on one side of the post, a clutch member mo'vable with the head, an insulating carrier on thel other side of the post, an operating clutch member carried by the carrier for rotatin the vco-acting yclutch member, an insulateil socket below the post and rear wall, an in-, sulated casing surroundin the base and provided with an-oriiice, an a pull cord connected with the insulating carrier extending through said orifice.

3. In a pull socket, an integral insulating base having a projecting rear wall', a shaft approximately parallel to said roar wall, a contact head upon' said shalt, coacting ratchet members one fixed to and the other loose on the shaft, an insulating carrier for the loose ratchet member having a projecting portion, a spring normally maintaining said projecting portion in contact with the rear wall, to positively position the movable ratchet in proper normal osition;` and a pull cord connected to the insu ating carrier.

4. ln a device o'f the character described, an insulating base, a transverse shaft, a contact mounted for rotation with the shaft comprising an oblong conductive member, and/a rectangular insulatin member, re cessed to receive the conductive member, to overlie the longer sides of said conductive member and leave exposedits shorter sides, a ratchet operatively associated with said head, a coacting actuating ratchet, and a cord connected with said actuating ratchet, and arranged when pulled to rotate said ratchet member.

ln testimony whereof l hereunto set my hand in the presence of two witnesses.

JOHN lil, HANSGN.

In the presence of- I GEO- Tl Jr.,

MARY F. ALLEN. 

